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J. A. M. TYLER & J. s. THOMAS.-

FOUR HORSE EQUALIZER.

No. 384,652. r v Patented June '19.,- 1888. a

NlTE STATES PATENT OFFICE.

JAMES A. M. TYLER AND JAMES S. THOMAS, OF PLUM CREEK, NEBRASKA.

FOUR-HORSE EQUALIZE'R.

.SPECIPICATION forming part of Letters Patent No. 384,652. dated June19,. 1888.

(No model.)

To aZZ whom, it may concern:

Be it known that we, .TAMEs A. M. TYLER and Lines S. THOMAS, citizens ofthe United States of America, and residents of Phi m Greek, Dawsoncounty,in the State of Nebraska,have invented an Improved Four'HorseEqualizer, of which the following is a specification.

Our object is to provide a means for hitching four horses abreast to aharvester and binder, so that they can walk on the stubble while themachine cuts the grain at their side, andto a plowin such a manner thatone horse can walk in the furrow and the other three on the land withoutcausing any side draft.

Our invention consists. in the construction and combination of acompound lever, a threehorse evener, and an adjustable coupling forconnecting the complete device with aharvester 0r plow, as hereinafterfully set forth, pointed out in our claims, and illustrated in theaccompanying drawings, in which- Figure l is a top view of the compoundlever; Fig. 2, of a three-horse evener; and Fig. 3 shows the completeequalizer ready to be applied.

Aisa straight wooden bar designed to be pivoted at its center to acoupling device adapted to be attached to a harvester or plow.

B is a straight bar pivoted at its inner end toa yoke, G, that ispivoted at its rear end to the center of the bar;

No. l is a singletree flexibly connected with the outer end of the bar Bby means of metal will allow the singletree to remain in parallelposition with the bar A, while the bar 13 assumes an inclined positionrelative to said bar and singletree, as indicated by dotted lines inFig. 1. p

f are straight metal bars pivoted to one end of the bar A and to theinner portion of the bar B in such a manner as to produce a com poundlever that will maintain a balance between a single horse hitched to theouter end of the said bar B and three horses hitched to the opposite endof the bar A by means of a three-horse evener attached thereto, as shownin Fig. 3.

g is a straight bar and the main piece of our three horse evener. h hare levers of the first order pivoted to the ends of thebar gby means ofclevises i.

N 0. 2 is a singletree flexibly connected with the-inner ends and longarms of the levers h by means of short metal bars k.

Nos. 3 and tare singletrees connected with the outer ends and shortarmsof the same levers h in such a manner that the draft force appliedto the singletree No. 2 by one horse will balance the force applied bythe two horses hitched to the singletrees Nos. 3 and 4 on the oppositesides of the singletree No. 2.

m is an elbow-shaped metal plate pivoted to the center of the bar A.

a is a perforated hinge-iron adj ustably com nected with the free end ofthe plate m, and adapted to be hinged to the frame of a harvester or thebeam of a plow.

r is a metal stay-strap pivoted to the bar A and plate in at one end,and adjustably connected with the perforated hinge-iron 'n at its otherend, as shown in Fig. 3, in such a man ner that our complete device canbe adj ustably connected with the hinge-iron to shift the joint draftforce of four horses laterally rela tive to the frame of a harvester orthe beam of a plow, as required, to make the complete device effectivein preventing side draft.

We are aware that a three-horse equalizer has been constructed like theone shown in our four-horse equalizer. \Ve are also aware that threelevers have been pivoted to a block fixed to a pole and connected bynieans of straps in such a manner as to produce a compound lever towhich a single horse could be hitched to equalize the draft applied tothe center 1e ver that extended on the opposite side of the pole; butour manner of constructing a compound lever by means of a yoke and twoparallel levers of unequal length, and combining a three-horse equalizertherewith to produce a four-horse equalizer, and our manner of constructing and combining an adjustable coupling therewith is novel andgreatly advantageous.

We claim as our invention 1. In a four-horse equalizer, the combinationof the bars A and B, the yoke O, and

metal straps f, substantially as shown and deevener composed of a bar,g, two levers, h, two to scribed, for the purposes stated. clevises, 1',two bars, 70, and three singletrees,

2. The adjustable coupling device consistarranged and combined tooperate in the maning of the plate m, hinge iron n, and straps r, nerset forth, for the purposes stated.

in combination with the bar A, substantially JAMES A. W[. TYLER.

as and for the purposes stated. JAMES S. THOMAS.

3. In a four-horse equalizer, the combina- Witnesses:

tion of the bars Aand B, the yoke (3, and metal JOSEPH ORMOND,

straps f, and a singletree, and a three-horse H. 0. SMITH.

